The company promised and in the contract that were made for life and the replacement for anything that happens to the windows for free, it's been more than a year since I called them and they tell me that they don't have the material, but they do have to offer new windows to new customers....

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TRUSTED BY WILTON, CT HOMEOWNERS
4.5
Average homeowner rating319
Verified window and door contracting services reviews
Verified Reviews for Window And Door Contracting pros in Wilton, CT
Last update on October 11, 2025
- Grey L.
- Brian Y.
The whole experience was great. I asked for a quote, and immediately spoke with John who sent me over some options. Wood, vinyl, and hybrid windows. After speaking with him and discussing my needs, he made some recommendations and came over with some samples. John was honest and actually...
- Patricia Q.
Tomasz' crew did a great job. He suggested aluminum wrap on each window for protection from the elements. It was a one-day job. We have beautiful new windows! We have also asked Tomasz to replace our crank window in the kitchen. We highly recommend TL Home Improvement.
- Michael R.
They were very responsive to the request - contacting me quickly, and coming out to the property to quote the job equally so. The price was fair, the work was well-done, and I had to laugh when three evenings later, a neighbor stopped by to ask if we got new windows (Silver Moon only cleaned...
- John B.
Overall it went well and I am happy with the windows. Ron was great to review the window options and get the contracts signed. The windows did come in earlier than expected and the company was flexible when we had to reschedule the install date by a week My only issue is the installers did...
- Cathy C.
They did an excellent job. I noticed a few minor spots on one window and he re-did the inside and outside. He definitely is very conscientious about his work. I'm very happy with him, would recommend them and will use again.
- Theresa L.
We were very impressed with the workmanship and professionalism shown by Cassella staff when the doors were originally installed. The price was excellent and the job was completed in one day. The responsiveness and timely repair work completed last Thursday by Gabriel Cassella was...
Find Window and door contractors in Wilton

A1 Home Improvement, LLC
A1 Home Improvement, LLC
A1 Home Improvement LLC. is based on the belief that the needs of our customers are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. We specialize in residential and commercial exterior projects. Call today for a quote.
"Roofing its something no home owner ever wants to do, but most have to go through. I won't even lie I wasn't even planning on getting a new roof, but Dale Knocked on my door and thats where the process started. My roof did go through insurance & aside from signing paper work/paying my deductible A1 handled everything. Obviously specific details from the insurance goes to you and then given to A1. Its not a short process and there is paperwork you have to sign, but all In all it did take me about 4 to 5 months where the process was started to roof replacement. Dale handled interactions with showing my the conditions of my roof and how to go about getting it put through the insurance. The only hiccup was that I have solar panels and I did feel like they where taken down to early (almost 5 months off), but I made my concerns known and one of the Managers called me and credited me $500 bucks (100 per month) that the panels where off. They did tell me setbacks in productions and things happen, but made me happy by giving me this credit. Didn't fight me on it, and didn't make me feel like I was just an insurance check on the other end. You can trust A1 home improvement with your home. I would like to thank Dale for his work & all the others that helped me throughout one of the most stressful process there can be for a house."
RUBEN G on July 2025
A1 Home Improvement LLC. is based on the belief that the needs of our customers are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. We specialize in residential and commercial exterior projects. Call today for a quote.
"Roofing its something no home owner ever wants to do, but most have to go through. I won't even lie I wasn't even planning on getting a new roof, but Dale Knocked on my door and thats where the process started. My roof did go through insurance & aside from signing paper work/paying my deductible A1 handled everything. Obviously specific details from the insurance goes to you and then given to A1. Its not a short process and there is paperwork you have to sign, but all In all it did take me about 4 to 5 months where the process was started to roof replacement. Dale handled interactions with showing my the conditions of my roof and how to go about getting it put through the insurance. The only hiccup was that I have solar panels and I did feel like they where taken down to early (almost 5 months off), but I made my concerns known and one of the Managers called me and credited me $500 bucks (100 per month) that the panels where off. They did tell me setbacks in productions and things happen, but made me happy by giving me this credit. Didn't fight me on it, and didn't make me feel like I was just an insurance check on the other end. You can trust A1 home improvement with your home. I would like to thank Dale for his work & all the others that helped me throughout one of the most stressful process there can be for a house."
RUBEN G on July 2025

Power Home Remodeling
Power Home Remodeling
As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.
"The workers arrived on-time, were very professional and did a great job."
Eric M on August 2025
As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.
"The workers arrived on-time, were very professional and did a great job."
Eric M on August 2025

Tri-State Window Factory Corp
Tri-State Window Factory Corp
Tri-State is the manufacturer and installer of premium quality vinyl windows and patio doors. We do the entire job ourselves, no subcontractor or middleman! Tri-State builds them, installs them and we guarantee them.
"Fast good price clean"
Jason H on September 2024
Tri-State is the manufacturer and installer of premium quality vinyl windows and patio doors. We do the entire job ourselves, no subcontractor or middleman! Tri-State builds them, installs them and we guarantee them.
"Fast good price clean"
Jason H on September 2024
VELUX America
VELUX America
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.

Thermo Seal Windows Siding & Roofing
Thermo Seal Windows Siding & Roofing
With more than 40 years of combined experience, Thermo-Seal Windows & Siding is the company to choose for superior custom made windows, patio doors, entry doors, storm doors, roofs, and vinyl, composite & wood siding. We are GAF Master Elite certified, which only 3% of the roofers in North America have this certification. We pride ourselves in superior customer service and satisfaction, while offering a no obligation in-home free estimate. We DO NOT do window/siding REPAIR work. Whether you are looking for an eight foot sliding glass door, gutters, roofing, double hungs or an eleven foot bow window, Thermo Seal has the craftsmanship and the custom built products for you. We have 3 locations: Headquarters: 411 Theodore Fremd Avenue Rye, NY 10580-1410, Showroom at: 456 Sunrise Highway, Rockville Center, NY 11570 Melville Location: 68 South Service Road Melville, N.Y. 11747 *Financing Available: 24 Months No Interest* *Licensing Information* Westchester License #: WC18925-H07 Connecticut License #: HIC616176 Yonkers License #: 4352 New Jersey License #: 13HV03970200 Suffolk County License #: 43947H Southampton License #: L002290 Nassau License #: H08105300 NYC DCA #: 1310460 Rockland County#: H-11137-07-38-00
"Awesome job by Aaron and his team of Jada, Adrien and Silvio! Aaron was great to deal with and delivered in a timely and professional manner. With the current heat wave, we can already feel the difference in indoor comfort and the windows look great inside and out. We highly recommend Aaron and Thermoseal for your window installation!!"
Leigh D on August 2022
With more than 40 years of combined experience, Thermo-Seal Windows & Siding is the company to choose for superior custom made windows, patio doors, entry doors, storm doors, roofs, and vinyl, composite & wood siding. We are GAF Master Elite certified, which only 3% of the roofers in North America have this certification. We pride ourselves in superior customer service and satisfaction, while offering a no obligation in-home free estimate. We DO NOT do window/siding REPAIR work. Whether you are looking for an eight foot sliding glass door, gutters, roofing, double hungs or an eleven foot bow window, Thermo Seal has the craftsmanship and the custom built products for you. We have 3 locations: Headquarters: 411 Theodore Fremd Avenue Rye, NY 10580-1410, Showroom at: 456 Sunrise Highway, Rockville Center, NY 11570 Melville Location: 68 South Service Road Melville, N.Y. 11747 *Financing Available: 24 Months No Interest* *Licensing Information* Westchester License #: WC18925-H07 Connecticut License #: HIC616176 Yonkers License #: 4352 New Jersey License #: 13HV03970200 Suffolk County License #: 43947H Southampton License #: L002290 Nassau License #: H08105300 NYC DCA #: 1310460 Rockland County#: H-11137-07-38-00
"Awesome job by Aaron and his team of Jada, Adrien and Silvio! Aaron was great to deal with and delivered in a timely and professional manner. With the current heat wave, we can already feel the difference in indoor comfort and the windows look great inside and out. We highly recommend Aaron and Thermoseal for your window installation!!"
Leigh D on August 2022
L&L CONSTRUCTION
L&L CONSTRUCTION
I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!
"Absolutely amazing. Super fast response. Worked around my insane work schedule. Job was done perfectly! Totally professional they were prompt. Early each morning finished so fast and absolutely lovely to deal with. Will be hiring for other projects. Thank you!"
Karen M on May 2025
I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!
"Absolutely amazing. Super fast response. Worked around my insane work schedule. Job was done perfectly! Totally professional they were prompt. Early each morning finished so fast and absolutely lovely to deal with. Will be hiring for other projects. Thank you!"
Karen M on May 2025

Renewal by Andersen
Renewal by Andersen
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"We are extremely happy with how our new windows and new front door turned out. After some unexpected challenges with the way our home was built, our installation crew quickly and efficiently adapted to make sure our windows and door were installed with expert care. Every time we see our new beautiful picture window we are left breathless! And our beautiful front door is the perfect upgrade for the look of our home. Thank you RBA!"
JENNIFER S on August 2025
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
"We are extremely happy with how our new windows and new front door turned out. After some unexpected challenges with the way our home was built, our installation crew quickly and efficiently adapted to make sure our windows and door were installed with expert care. Every time we see our new beautiful picture window we are left breathless! And our beautiful front door is the perfect upgrade for the look of our home. Thank you RBA!"
JENNIFER S on August 2025
CAC Carpentry Art & Craft
CAC Carpentry Art & Craft
CAC carpentry Art & Craft is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 25 years of experience serving Greenwich, CT and surrounding areas. Call today and let us put our experience to work for you!
CAC carpentry Art & Craft is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 25 years of experience serving Greenwich, CT and surrounding areas. Call today and let us put our experience to work for you!
Hill Top Remodeling, LLC
Hill Top Remodeling, LLC
With over 30 years of experience in the Remodeling industry, Hill Top Remodeling, LLC is your industry expert. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!
"If you want sloppy incomplete and incorrect work hire Hilltop. Bill did not use the products contracted for- used less expensive options without telling us - and hardly ever showed up. The job went way beyond promised finish date. Paid the full balance, Bill then left the work unfinished and ghosted us!"
T P on July 2025
With over 30 years of experience in the Remodeling industry, Hill Top Remodeling, LLC is your industry expert. We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!
"If you want sloppy incomplete and incorrect work hire Hilltop. Bill did not use the products contracted for- used less expensive options without telling us - and hardly ever showed up. The job went way beyond promised finish date. Paid the full balance, Bill then left the work unfinished and ghosted us!"
T P on July 2025

All Cleaning & Maintenance LLC
All Cleaning & Maintenance LLC
We are a locally owned and operated company that values honesty, integrity, and treats your home as if it were our own. We offer a variety of general contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!
"Great communication and punctuality. Would re-hire and recommend to all of my friends."
Mitchell S on June 2024
We are a locally owned and operated company that values honesty, integrity, and treats your home as if it were our own. We offer a variety of general contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!
"Great communication and punctuality. Would re-hire and recommend to all of my friends."
Mitchell S on June 2024
FAQs for window and door contracting projects in Wilton, CT
Door installation usually takes three and four hours, including removing the old door and frame, fitting the new door and frame in place, shimming it to make sure it’s perfectly level, and making adjustments to the hinges and locking mechanisms to ensure proper functionality. A door-hanging professional can replace an interior door in between one and two hours. Door installation will take significantly longer if your installer needs to create a wall opening, and it can take less time if the existing door frame remains.
If you have a problem with your window, such as broken glass, minor leaks, or a problem with your window being stuck, repairing the broken part might be a cheaper option than replacing the entire window. However, if you have a deteriorating window frame or major leaks, buying a new window will be the better long-term solution.
The average cost to install a door is around $1,100, but you could pay anywhere from $150 for a hollow-core interior door installation up to $2,000 or a high-end exterior door installation. There are a few cost factors to consider to get an accurate price, including whether your wall opening exists, the type of door, the quality and security of the door, whether you need to replace the frame, and the door size. You can expect to pay $150 to $700 for a standard 36-by-80-inch door and between $400 and $1,600 for an 80-by-48-inch door.
Window replacement costs between $180 and $410 per window, or an average of $280 per window. However, your specific replacement job could cost as little as $100 or as much as $750. Factors such as frame material, the number of windows you need, and the type of glass you order all impact the overall cost. For example, simple double-glazed windows will cost $3 to $6 per square foot, but the stronger tempered glass ranges from $12 to $14 per square foot.
It’s possible to install a door yourself if the wall opening already exists, but the work is rather complicated, and a professional installation is usually well worth the investment. For your door to work and close properly, you’ll need to shim and level the door frame in your wall perfectly, which can be difficult. Additionally, we recommend you always hire a professional door installer to place an exterior door, as mistakes during the installation process can lead to poor security for your home.
The Wilton, CT homeowners’ guide to window and door contracting services
From average costs to expert advice, get all the answers you need to get your job done.
The frame is a crucial part of a door’s looks and proper functioning. Here’s how much you can expect to pay to replace a door frame in your home.
The average cost to install a pocket door is $1,050, but prices can range from $800 to $2,500, depending on the type of door, materials, and scope.
When adding a fresh new entryway to your home, you may be curious about the cost of sliding glass doors. Let's break it down by size, style, and design.
Trying to decide between fiberglass and steel doors? Explore the differences before choosing the best one for your home.
Understanding the different sliding glass door parts helps if you need to install one or perform maintenance to keep it in good working order.
Screen and storm doors offer protection and allow more natural light into your home. Uncover the critical differences between storm doors and screen doors.
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